From the Richmond Dispatch, 6/25/1861, p. 2

N. O. Washington Artillery. - Two companies of the
celebrated Battalion of Washington Artillery, under Major Walton, left for
Manassas Junction about 12 o'clock on yesterday. The remaining company will no
doubt soon join their comrades. We know of no body of men more capable of
raining iron hail on their enemies than these same artillerymen. Success to
them.